baber/WOPTO huggingface dataset:
Patent GB-252079-A (GB)
Title: Improvements in or relating to four electrode valves and to means for obtaining highfrequency or low frequency magnification or rectification therewith
IPC: H03F3/02
Filed: 1925-02-18
Abstract: 252,079. Marconi's Wireless Telegraph Co., Ltd., and Gill, E. W. B. Feb. 18, 1925. Vacuum tubes. - A four-electrode valve, such that the sum of the currents which the outer grid and anode can pass, is always less than the maximum electronic emission, has its anode and inner grid maintained at positive potentials, while the outer grid is at a low positive or negative potential, the arrangement being such that increase in inner grid potential produces a decrease in inner grid current. Potential variations of high or low frequency may be applied to the outer grid 2. A resistance 5 of 20,000 ohms may be interposed between the inner grid 4 and a 40-volt battery 6, or one of 50,000 ohms for a 70-volt supply, giving potential magnifications of the values 16 and 40 respectively. A condenser and grid leak may be placed in the outer grid circuit. A condenser 8 transmits the magnified potential variations to the grid of a triode 10. The range over which the negative resistance effect occurs may be varied by altering the filament current. The diameter of the outer grid is not less than 2¢ times that of the inner grid, and not greater than five times the diameter of the inner grid or greater than its length. If the grids are flat, the distance between the grids must be greater than the distance from the filament to the inner grid and less than the length of this grid.
Patent GB-962942-A (GB)
Title: Building units particularly for roofing
Inventor: DAWSON WILLIAM
IPC: E04B1/19
Filed: 1962-02-06
Abstract: 962,942. Roof units. IMPERIAL CHEMICAL INDUSTRIES Ltd. Jan. 23, 1963 [Feb. 6, 1962], No. 4608/62. Headings E1B and E1V. A thermoplastic roof unit comprises a truncated pyramidal or conical member 1, having a rectangular base 2 with an upturned flange 3, to the top of which is secured a similar member 4 having a rectangular base 5 of at least the same dimensions as the base 2 and having a downturned flange 6. A number of such units are secured together, as by bolting, through the flanges 3, 6 reinforced with metal backing 7 to form a flat, barrel or dome roof according to the relative dimensions of the bases 2 and 5. Reinforcement by stays between the flange bolts may be provided as may insulation of foam plastic within the hollow area bounded by adjacent units.
Patent GB-488917-A (GB)
Title: Improvements in methods and apparatus for sizing paper
IPC: D21H23/20
Filed: 1938-02-14
Abstract: 488,917. Sizing paper. KODAK, Ltd. Feb. 14, 1938, No. 4613. Convention date, March 27, 1937. Addition to 470,777. [Classes 96 and 140] The method of sizing paper disclosed in the parent Specification is modified in that air occluded in the paper is driven out by a mixture of steam with air so proportioned as to allow the desired amount of size to penetrate into the paper. Steam admitted at 20 flows through an aspirator 19 entraining and mixing with air drawn through a filter 27 and along the outside of a jacketed steam heating pipe 29. The mixture passes to a series of pipes 13 directing it against both surfaces of the paper 5. Valves 23 and 25 control the inlet of steam and air respectively and valves 14 the distribution of mixture across the paper. A solution 10 of 35 lb. of size per 100 gals. of water may be used for photographic paper.
Patent GB-354773-A (GB)
Title: Improvements in and relating to the art of discharge or reserve printing
IPC: D06P5/15
Filed: 1930-02-11
Abstract: Esters of reduced quinones, such as anthraquinones, benzoquinones, and vat dyes, including indigoid dyes, containing azo linkages, particularly those described in Specifications 333,506, [Class 15 (ii), Dyeing, Processes &c. for], and 333,507, [Class 2 (iii), Dyes &c.], are discharged or resisted on textile fabrics by printing the fabrics with an alkali applied in a suitable medium, followed by steaming.  The discharge pastes may be applied to materials which have been dyed with colours not discharged under the conditions of the process in conjunction with the dischargeable colours, or they may contain non-dischargeable dyes, such as enolic sulphuric esters of vat dyes or azo dyes other than those derived from esters of reduced quinones.  In examples, (1) a ground coloured with the dye obtained by coupling the diazotized sulphuric ester salt of 2-aminoanthrahydroquinone with the anilide of 2 : 3-oxynaphthoic acid is discharged white by printing with a paste containing British gum and caustic soda and steaming, (2) a cloth printed with the dye obtained by coupling the diazotized sulphuric ester salt of 2-aminoanthrahydroquinone with the o-anisidide of 2 : 3-oxynaphthoic acid is cross-printed with a paste containing caustic soda, glycerine and British gum, dried, steamed and developed by passing through sodium nitrite solution and through dilute hydrochloric acid, (3) a cloth is printed with a resist paste containing china clay, caustic soda and British gum, dried, cross-printed with a paste containing the dye referred to in example 2, British gum and glycerine, steamed and developed as in example 2, (4) cloth dyed with Solazol red 2B and developed is printed with a paste containing Chlorazol fast yellow BS, glycerine, gum tragacanth and potassium carbonate and steamed to obtain a yellow discharge on a red ground, (5) a blue discharge is obtained by using Chlorazol sky blue FFS and proceeding as in example 4, with the exception that Resist salt L is added to the discharge paste, (6) cloth dyed with Solazol red 2B is printed with a paste containing Katanol O, potassium carbonate and British gum, dried, steamed, acidified and dyed with a basic dye, such as Victoria blue RS or Malachite green, and (7) cloth is dyed with a mixture of Solazol red 2B and Soledon jade green, developed with acid ferric chloride, printed with a paste containing British gum and caustic soda, steamed, rinsed and soaped; a bright green discharge on a chocolate ground is obtained.
Patent GB-772955-A (GB)
Title: Method and composition for inhibiting growth of fungi and nematodes
Filed: 1954-02-17
Abstract: Grain, e.g. wheat, seeds, plants, and soils contaminated with or liable to attack by fungi, insects and nematodes are treated, preferably fumigated, with a volatile acrylate ester or mixture of acrylate esters, to inhibit growth of the contaminants or protect the grain &c. against them.  Suitable esters are methyl-, ethyl-, propyl-, butyl-, allyl-, 2-ethylhexyl-, 2-chloroethyl-, acrylates, the acrylates of glycol methyl-, glycol ethyl-, and glycol benzyl-ether, and methyl-carbitol, butyl hydracrylate, ethyl- and n-butyl-methacrylate, and glycol diacrylate.  The most volatile esters are the most effective.  A small amount of a polymerization inhibitor, e.g. p-tertiary-butyl catechol, hydroquinone, tetra-chlorohydroquinone, and symmetrical di-betanaphthyl-p-phenylene diamine may be added to the esters. Xylene or petroleum ether solutions containing at least 20 per cent by volume of acrylate ester, or an aqueous emulsion containing between 25 and 85 per cent by weight of acrylate ester, and e.g. a wetting agent, or a dusting powder containing between 20 and 30 per cent by weight of acrylate ester and an inert substance such as kieselguhr, clay, talc, chalk, calcium oxide and p  carbon black, and, optionally a wetting agent, may be used.ALSO:A volatile acrylate ester or mixture of acrylate esters is used for treating, preferably fumigating, grain, seeds, plants, and soils to protect them against fungi, insects, and nematodes. Suitable esters are methyl-, ethyl-, propyl-, butyl-, allyl-, 2 ethylhexyl-, 2 - chloroethyl - acrylates, the acrylates of glycol methyl-, glycol ethyl-, and glycol benzyl-ether, and methyl-carbitol, butyl hydracrylate, ethyl- and n-butyl-methacrylate, and glycol diacrylate.  A small amount of polymerization inhibitor, e.g. p - tertiary butyl catechol, hydroquinone, tetra - chlorohydroquinone and symmetrical di - betanaphthyl - p - phenylene-diamine, may be added to the esters.  Xylene or petroleum ether solutions containing at least 20 per cent by volume of acrylate ester or an aqueous emulsion containing between 25 and 85 per cent of acrylate ester and, e.g., a wetting agent, or a dusting powder containing between 20 and 30 per cent by weight of acrylate ester and an inert substance such as kieselguhr, clay, talc, chalk, calcium oxide and carbon black and, optionally, a wetting agent may be used.
Patent GB-415060-A (GB)
Title: Improvements in or relating to modulated carrier wave receivers, particularly for radio receivers
IPC: H03G3/22
Filed: 1933-02-15
Abstract: 415,060. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, and LINSELL, A. A., 43, West Hill, Sydenham, both in London. Feb. 15, 1933, No. 4659. [Class 40 (v).] In a supersonic heterodyne receiver gain control is accomplished by controlling the frequency of the local oscillator in dependence on received signal strength. In the embodiment shown, the receiver comprises aerial 1, high frequency amplifier 2, first detector 3, intermediate frequency amplifier and second detector 5 and oscillator valves 9, 10. The valves 9, 10 whose anodes are connected together and to a coil 23 coupled to the first detector, have frequency determining circuits 19, 21 respectively connected in their grid circuits and tuned slightly above and below the intermediate frequency to which the circuits 5 are tuned. The frequency generated by the combination 9, 10 is varied by altering the current flowing through a resistance 17 common to the grid circuits and supplied with the smoothed current from a rectifier 14 fed from a tuned circuit 13, 13<c>, coupled to the high frequency amplifier. In a modification said smoothed current is fed to a galvanometer mechanically coupled to a condenser which determines the frequency of the locally generated oscillations.
Patent GB-925634-A (GB)
Title: Improvements in or relating to the manufacture of luminescent materials
Inventor: DEAN PATRICIA
IPC: C09K11/08
Filed: 1961-02-08
Abstract: 925,634. Luminescent materials and processing. GENERAL ELECTRIC CO. Ltd. Feb. 7, 1962 [Feb. 8, 1961; April 20, 1961], Nos. 4710/61 and 14299/61. Class 39 (1). A luminescent material consists of a combination of the oxides of magnesium, lithium, antimony, silicon, together with lithium fluoride, tetravalent manganese, and the oxide of either silicon or germanium, or both. Additionally, calcium, strontium or barium may be added, as fluoride, and may wholly or in part replace the lithium fluoride. The manganese may be introduced from an aqueous solution of a soluble manganese salt, e.g. manganese chloride, and the oxides may be introduced as the carbonate, the mixture being fired in air at about 1,000‹ C. up to three times, being ground between each firing. The luminescence may be excited by ultra-violet radiation, cathode-rays and X-rays.
Patent GB-988791-A (GB)
Title: Improvements in and relating to electrical length measuring and control apparatus
Inventor: ROYLE GEORGE DEREK
IPC: B23D33/00
Filed: 1960-02-10
Abstract: 988,791. Measurement of length. ENGLISH ELECTRIC CO. Ltd. April 28, 1961 [Feb. 10, 1960], No. 4770/60. Heading G1M. The length of a bar 10 leaving a rolling mill is measured by a set of equally spaced photoelectric cells 14 and a further set of equally spaced photo-electric cells 15, whose total separation is the same as that between adjacent cells 14. The cells give a "material absent", or "material present" signal which is fed to a unit 16. When at least one cell 15 produces a "material present" signal and at least one cell 14 produces a "material absent" signal the unit 16 calculates the length of the rod. A more accurate measurement may be made by using a roller 22 engaged by the leading portion of the bar 10 to send a signal to the unit 16 depending on the position of the end of the bar between the cells 15. A computer 17 is fed with the measured length from the unit 16 and also with required piece lengths from a unit 18. The computer selects and shows on an indicator 21 the piece lengths which will leave the minimum wastage and the bar is cut by an operator using a hot saw 13. The operator can reset the computer to produce a new programme after some pieces have been cut if he notices that the length of deformed tail on the bar is different from that expected. If the bar 10 is larger than the separation of the outer cells 14, 15 the computer shows on the indicator the required piece lengths in the order fed into a storage unit for the computer, and these are cut off until the bar 10 is of measurable length.
Patent GB-644502-A (GB)
Title: Solenoid construction
IPC: H01F21/06
Filed: 1948-02-18
Abstract: 644,502. Electromagnets. GUARDIAN ELECTRIC MANUFACTURING CO. Feb. 18, 1948, No. 4837. Convention date, March 23, 1942. [Class 35] The coil 14 of a plunger type electromagnet is mounted within a magnetic housing 10 and has an inner sleeve 16 divided into a non-magnetic part 17 and a magnetic part 18, this sleeve containing a stationary magnetic plug 22 having a non-magnetic tubular extension 28 in which the plunger 23 slides. A nut 26 may be used to lock the plug 22 in any desired axial position. The cup-shaped housing is closed by an endplate 11 secured by bent-over tongs 12, and additional magnetic discs 19, 20 are secured to the ends to provide an adequate flux path.
Patent GB-103394-A (GB)
Title: Improved Method of and Means for Cooling the Cylinders of Internal Combustion Engines.
Inventor: BIRTILL JOSEPH EDGAR
IPC: F01P1/02
Filed: 1916-04-04
Abstract: 103,394. Birtill, J. E. April 4, 1916. Cylinders, cooling.-Air is drawn continuously through the cylinder jackets in the direction shown by the arrows, by a rotary pump c driven from the engine shaft at high speed.
Patent GB-220497-A (GB)
Title: Method for the production of collapsible tubes or containers of aluminium by extrusion
IPC: B21C23/01
Filed: 1923-02-20
Abstract: 220,497. Singer, F., and Fenag Tubenfabrik Ges. Feb, 20, 1923. Drawings to Specification. Collapsable tubes.-Thin walled tubes of aluminimum are made bv the cold extrusion in one stage of square instead of the usual circular blanks. These blanks may have a central hole and they are made by cutting without waste from strips of metal of the width and thickness of the blanks. The strips are obtained by cutting, roll ing or extrusion.
Patent GB-760829-A (GB)
Title: A drive for a centrifugal spinning pot
Inventor: SVATY VLADIMIR
IPC: D01D7/02
Filed: 1954-02-19
Abstract: 760,829. Spinning pots, driving means. MIRA, ZAVODY NA PLETENE A. STAVKOVE ZBOZI NARODNI PODNIK. Feb. 19, 1954, No. 4939/54. Class 120 (2). A centrifugal spinning pot is mounted for rotation on a stationary spindle and is caused to rotate in the manner of a turbine wheel by means of fluid under pressure. In the arrangement shown a pot 2 has a re-entrant central portion 3 the apex of which is located near the centre of gravity of the pot and bears upon the end of a vertical, resilient, stationary spindle 1. The portion 3 is formed at its part of greatest diameter with a ring of teeth 8<SP>1</SP> and the spindle 1 has an axial bore 6 and a horizontally disposed flange having channels 7 which extend radially and are bent tangentially so that they open like nozzles at the rim of the flange. Fluid is forced under pressure up the axial bore 6 in the direction of arrow a and out through the channels 7 to impinge on the teeth 8<SP>1</SP> and thus rotate the pot 2. The fluid then collects in casing 10 and is withdrawn in the direction of arrow b. The axial bore 6 extends in a narrower form to the top of the spindle 1 and fluid discharged at this point acts as a lubricant for the bearing surfaces. Thread 11 is introduced into the spinning pot by a feed tube 12.
Patent GB-1495071-A (GB)
Title: Typewriter ribbon
IPC: B41J35/18
Filed: 1975-02-05
Abstract: 1495071 Ink ribbons XEROX CORP 5 Feb 1975 4941/75 Heading B6F An ink ribbon comprises a plurality of longitudinally spaced inked portions 140, 142 ... 162 of various colours separated by barrier portions 139, 141 ... 163 to prevent portions of different colours coming into contact when wound on a spool 130 or 134. The barrier portions are lacquer coated nylon strip. The barrier portions are provided with signal means such as apertures, metallic insertions, different surface textures or machine readable indicia to permit reversal of the ribbon while keeping the same colour in the printing area of a typewriter. The signal means may be coded to permit automatic feeding to a preselected colour portion.
Patent GB-762984-A (GB)
Title: Improvements in wheels having built in shock absorbers
IPC: B60B33/04
Filed: 1954-02-19
Abstract: 762,984. Spring wheels. FLEXELLO CASTORS & WHEELS, Ltd., and WAPSHOTT, S. E. Feb. 21, 1955 [Feb. 19, 1954], No. 4982/54. Class 144 (1). A spring wheel comprises a rim or wheel body 1 rotatably mounted via ball or roller bearings 7 on a hub member 2 which is eccentrically mounted for limited angular movement on a fixed axle 3 of non-circular (square) section, a plurality of (cylindrical) rubber or like blocks 4 being interposed between the surfaces of the axle 3 and the non-circular (square)-section axle hole 5 in the hub 2 to absorb shock by resistance to shear and compression stress under load. As shown applied to a wheel mounted in a castoring fork 13, the rubber blocks 4 assume an oval cross-section when fitted and bear against the radiused corners 6 of the hole 5. The axle ends 12 are of square-section to locate in slots in a fork mounting 13. The rubber blocks 4 are partially covered by friction washers 16 at each end of the axle 3 and coverplates 8 are screwed to the hub 2 to enclose the rubber blocks and also the ball or roller bearings 7. Specification 652,266, [Group XXXII], is referred to.
Patent GB-646852-A (GB)
Title: High voltage selenium rectifiers and manufacturing process
IPC: H01L21/105
Filed: 1948-02-20
Abstract: 646,852. Dry-contact rectifiers. STANDARD TELEPHONES & CABLES, Ltd. Feb. 20, 1948, No. 5010. Convention date, Feb. 28, 1947. [Class 37] A process of manufacturing selenium rectifiers comprises subjecting them to the vapours of an aldehyde and to the action of ammonia and/or of a material selected from the group of amines, after heat-treatment and before the application of the counter-electrode. Amines referred to are monomethylamine, dimethylamine, benzinamine, anilin, hexamethylene-tetramine. Specification 633,275 is referred to.
Patent GB-332188-A (GB)
Title: Improvements in and relating to mechanically propelled ships or vessels
IPC: B63B1/08
Filed: 1929-02-14
Abstract: 332,188. Pratt, F. G. Feb. 14, 1929. Screw propellers. - Means for accelerating the flow of water adjacent to the hull in close proximity to the propellers comprises an enlargement built in or added to the skin of the vessel, such enlargement being greatest in the plane of the propellers. The hull 1 is provided with enlargements 7 in the vicinity of the propellers 4, 5, the enlargement being greatest in the plane of the propellers and fairing off fore and aft and extending above and below the level of the swept circle. The speed of flow of the water 3 near the hull is speeded up to approximate to that of the outer less-disturbed water 6.
Patent GB-1386593-A (GB)
Title: Production of rotary elements
IPC: B60B5/02
Filed: 1971-02-19
Abstract: 1386593 Moulded tyre and wheel assemblies REVVO CASTOR CO Ltd 11 Feb 1972 [19 Feb 1971] 5039/71 Heading B7C [Also in Division B5] A rotary element such as a roller or wheel is made by injection moulding an interconnected central hub 1 and rim 3, and forming a tyre 4 on the rim by injection moulding a material compatible with the material of the rim directly on to the rim so that the tyre is thereby bonded to the rim. The hub 1, disc 2 and rim 3 may be of a polycarbonate and the tyre may be of polyurethane. The rim 3 may have a raised central portion 5, or may be flat or concave.
Patent GB-656191-A (GB)
Title: Improvements in or relating to automatic telephone systems
IPC: A43B13/32
Filed: 1948-02-20
Abstract: 656,191. Automatic exchange systems. WESTERN ELECTRIC CO., Inc. Feb. 20, 1948, No. 5087. Convention date, March 16, 1940. [Class 40 (iv)] In a cross-bar system, substantially as described in Specification 656,190, a line 13, Fig. 1, is multiplied to a finder switch 5 and to a final selector switch 6 and the corresponding hold magnets in both switches are operated when a call is originated. A link 7 is taken into use for a connection and is released if the connection is not completed within a predetermined time interval. In a revertive call on a party line, the exchange switches are released when the called party replies but no new calls can be made over the party line whilst it is busy. General operation, Fig. 1. When a subscriber 13 makes a call, select magnet 15 and hold magnets 16, 17 are operated under the control of a marker 12, a link 7 is selected to extend the connector to a switch 8 and the line is connected to a recorder 11 and to the marker 12. The recorder 11 records the dialled digits and the marker 12 selects a junctor 9 and completes the connection to the called subscriber 14 over the final selector 6. Detailed operation, Fig. 2. A calling line is marked by operation of a line relay 30. The select magnet 22 and the hold magnet 23 in the finder (5 in Fig. 1) are operated by the marker. The corresponding hold magnet 27 in the final selector (6 in Fig. 1) is operated over a contact of 23. Dialling tone is now provided from a generator 35 and the dialled digits are received by a pulsing relay 34 in the recorder. The select magnet 37 and the hold magnet 42 of the called party are operated in T along with 40 in CO. The marker and the select magnets release together and the called party is rung. The hold magnets 23, 40 are held over the sleeve wire when the called party replies. Time control. Relay 44 operates with 23, 49 being already operated, and both are held over a contact of 45. Relays 44, 45, 46, 48 and 47 operate in sequence, the last three being slow to operate. The hold on relays 44, 23 is removed when 47 operates at the end of a sequence and if 27 is not held over the sleeve wire on completing the connection, it releases, line relay 30 re-operates and hold magnet 27 is still held to keep open the marking lead 31. Party line, revertive calls. The called line tests busy, conductor 50 being grounded and conductor 51 being open at contacts of hold magnet 27 in the switch T. A marker relay is operated over conductor 50 and if the called and calling lines are the same, a ringing circuit is seized and operated. When the called party replies the connection is released, leaving operative only hold magnet 27 and line relay 30 till the call ends.
Patent GB-238472-A (GB)
Title: Improvements in wheel barrows
IPC: B62B1/18
Filed: 1925-02-24
Abstract: 238,472. Etten, W. V. van. Feb. 24, 1925. Springs, wheels, and axles, arrangement of. - In a wheelbarrow of the kind in which the wheel 1 axle is mounted in bearings carried by springs secured to the frame in parallel relationship therewith, the bearings are adjustable along the springs and releasable means lock the bearings in different positions of adjustment. The looped front ends 14 of the springs 12 are secured to the frame and handle bars 1 by bolts 15 which also secure brace bars 11 for the body 3, and the rear ends of the springs slide in guides 16 on a cross-bar 8 which connects the bars 1 and to which the body is secured by bolts which also secure brace bars 10 for the legs 4. The bearings 20 for the wheel axle 7 are of inverted channel form and embrace the springs 12, levers 2 with cam heads rotatable on the axle serving to lock the springs and bearings together in the position most suitable for the load.